给程序自动升级的功能类库，可以给你的程序进行多个文件或单个文件的上传。-Automatic upgrade feature to the program library, the program can give you multiple files or single file uploads.

多文件选择性上传，一次性选择多张图片或文件，选择需要的上传(Selectively upload multiple files, select multiple pictures or files at one time, select the required upload)